Classification
TCLF - Radio, video, telephone
13
AQPT - Bibliographies and databases on special subjects
6
DYK - Image processing
4
TBS - Digital electronics
3
TCJB - Digital signal processing
3
TBA - Electronic engineering - general
2
TCD - Communication systems
2
TCDB - Electric communication systems
2
TCL - High frequency engineering
2
TGH - Technical optics
2
EPK - Nuclear energy
1
PGN - Fusion technology, plasma devices
1
TBX - Noise in electronics
1
TCLK - Electric filters and amplifiers, antennas
1
TEF - Electric machines, electric cables
1
TGBO - Optical measurement
1
THD - Design and construction in mechanical engineering
1
UEN - Environmental economy
1
ZAB - Media studies (without bibliology)
1